Damn. I got angry...in a good way!
Really nice entry! The art style is simple, but you mimic windows in a veeery good way! Would have loved to got some background music. I know it is just the PC, but music always makes things a bit better :D SFX fit and I like the flickering and effects as well.
The game idea is quite easy: Save as many files as you can, but you can't save them all - perfect fit. And I like how much effort you put on naming and designing those files! I think the pop ups are great, but appear a bit too often. The end screen eventually is a nice touch as well..listing what you never will see again... :D
Great game overall!